Again, u r not correct, the Aspide is a derivate of American
AIM-7 Sparrow , the Italy exported some Aspide to China in later
1980s, then the Chinese developed the PL11 BVR AAM based on Aspide,
heres the photo of PL11:

Well, If I were the decision maker of the Fighter purchasing, I
would have cut the number of my procurement, That is, if the
AIM-120 is far more superior to SD-10, why I bother to buy an
additional stock of the totally new planethe J10? Because I could
just procure more F16sbrand new or 2nd hand, considering Pakistani
air Force already has the existing logistics to support the F16s.
However, by procuring the J10, the PAF will add a lot of jobs, say
ground facilities, training, maintenance etc. so, the buyers
judgment wont put the rating of SD-10 too low if compared to
AIM-120. Otherwise, they wont buy it at 1st place.